Deck Board Calculator
Enter your size to get deck board quantity, plus an estimated cost. Waste is included and prices are editable.
Material needed
Estimated cost
How to calculate deck board
Deck boards at about 2.2 boards per square foot, with waste.
Formula: quantity = area × 2.2 × (1 + waste %) = 100 × 2.2 × 1.10 = 242 boards.
Worked example
Example: 10 ft × 10 ft = 100 sq ft. Quantity: 242 boards, about $968 at $4 per boards.
Tips
Measure the full area, then subtract large openings if you want an exact count. Order a little extra for cuts and breakage, and confirm quantities with your supplier before you buy.
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Frequently asked questions
How much deck board do I need?
Example: 10 ft × 10 ft = 100 sq ft. Quantity: 242 boards, about $968 at $4 per boards.
How much waste should I add?
Add 10% for straight areas and 15% for areas with many cuts, corners and openings.
Are the prices accurate?
Prices are editable estimates. The defaults are typical US figures, and your local price can be higher or lower.